Power supply control system of CI (Conditional Independence) card and CA (Conditional Access) card compatible system and power supply method thereof

Abstract

The invention relates to a digital television technology, solves the problem that a traditional system adopting a CI (Conditional Independence) card is taken as a main body for the design of a compatible system and cannot be simultaneously compatible with power input required by a CA (Conditional Access) card, and provides a power supply control system of a CI card and CA card compatible system and a power supply method thereof. A technical scheme disclosed by the invention is as follows: the power supply control system of the CI card and CA card compatible system comprises a control module, the CI card, an interface and a power output pin, wherein the control module is connected with the power output pin which is connected with the interface, and a power input pin of the CI card can be connected with the power output pin through the interface. The power supply control system is characterized by further comprising the CA card and a CA card seat, wherein the CA card can be connected with the power output pin through the CA card seat. The invention has the beneficial effects that the power output pins of the CA card and the CI card can be multiplexed, and the system and the method are suitable for the CI card and CA card compatible system.

Description

technical field [0001] The invention relates to digital television technology, in particular to the compatible technology of CI card and CA card. Background technique [0002] In order to adapt to the different situations of CA systems in various parts of China, the digital TV receiving equipment proposed a machine-card separation scheme based on the CI interface. The CI scheme redefines the pins for the PCMCIA physical interface, and controls the output and input of the data stream. In the big card (CI card), the disadvantage of this is that the cost of the large card is relatively high, which directly increases the system cost, which is not a small fee for broadcasting and television operators and consumers, which seriously restricts The promotion of large card products, and now there is no system that can be compatible with large cards and small cards (CA cards), that is, there is no system that can meet both the use of large cards (CI cards) and the use of small cards (C...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the power input required by the current system that uses the CI card as the main body to be compatible with the power input required by the CA card, and provide a power supply control system and a power supply method for a CI card and CA card compatible system

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